Hi guys I have a NodeMCU and a 5 volts relay

Question

Hi guys I have a NodeMCU and a 5 volts relay

module(single channel). I need a module to supply both of these stuff. The NodeMCU is 3.3v and realy is 5v. Also the current matters. I also may have some electromagnetic lock that i would have to open/close. And finally a set of li-ion batteries to save and supply the whole circuit.
I should be able to plug 220v AC power to the input, and then all the other power transformation should be handled inside the box. What's the possible solution for such a project??
(I should have a battery in case of power shutdown)

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29.01.2020

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Teito Klien · Accepted Answer

Teito Klien

Use a ac to dc converter after stepping the voltage down , then use a power rail to give 3.3V to node and 5 to relay

0

30.01.2020

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Hi guys I have a NodeMCU and a 5 volts relay

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